By 1930, Taylor's Scientific Management -- despite resistance from unions and from intellectuals -- had swept the developed world. As a result, Marx's 'proletarian' became a 'bourgeois.' The blue-collar worker in manufacturing industry, the 'proletarian' rather than the 'capitalist,' became the true beneficiary of Capitalism and Industrial Revolution. This explains the total failure of Marxism in the highly developed countries for which Marx had predicted 'revolution' by 1900. . It explains why the Great Depression did not lead to Communist revolution. . By that time, Marx's proletarians had not yet become affluent, but they had become middle class. They had become productive.